Protective case for a mobile display device



FIG. 1 is a top plan view of our protective case for a mobile display device showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a top perspective view thereof.

The broken lines in the drawings depict environmental subject matter or parts of protective case for a mobile display device only and form no part of the claimed design. 

CLAIM The ornamental design for a protective case for a mobile display device, as shown and described. 